lol you cant use minting freely because its not the same kind of income youre minting.
Basically you have your yearly income and "other" incomes. Yearly income is what provides you with money that youre supposed to live on, it gets added on 1st january each year. If youre spending more money than you make on that day, then youre doing something wrong, you gotta scale down your ambitions to what you can afford.
If you were able to freely mint other incomes (trade, production, tariffs, tax etc) which represent your national "wealth", then youd be able to acquire 10, 20 or 50 times more money than you would get from yearly taxes. This would make the game ridiculously easy. By the way you can do that by turning the inflation off in options. What you get in return is small country that would under normal circumstances be able to afford no more than 5 units, now being able to field 20 or even more (if its a trading super power for example). It changes the game too much and makes it too easy.